diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index 043cc4f1..f3414bbc 100755
--- a/plugins/python-build/bin/python-build
+++ b/plugins/python-build/bin/python-build
@@ -19,6 +19,8 @@ PYTHON_BUILD_VERSION="20180424"
 OLDIFS="$IFS"
 
 set -E
+[ -n "$PYENV_DEBUG" ] && set -x
+
 exec 3<&2 # preserve original stderr at fd 3